A description of a test made recently in this test rig should prove of interest to those engaged in the design, stressing and structural testing of large aircraft structures, particularly wings, in that it would appear to represent a considerable advance over any previous test of this nature made in this country, and opens up new fields in simplicity and speed of application of the loads. The full load was applied to the wing in this test by one operator in approximately 50 seconds, thus approaching much more nearly than on any previous test made here the conditions which occur in flight.